5175ead765
The C code is a complete rewrite done by Guy Harris for 4.4BSD and is not the original from v7 at all. Unfortunately, the data file itself, without which the rest isn't useful, was not freed until Caldera released all of 32v a few years ago, so it was not in 4.4lite. The data file, the ching nroff macros, and the driver script are under Caldera or Caldera+Berkeley copyright. I've partially redone the driver script from 4.4 (there was no point in using a temporary file for the hexagram), which was already partially redone from 32v. (As an aside, it is nutty that the script needs a copyright so many times longer than the code.) I've renamed "cno" to "castching", "phx" to "printching", (the traditional names were opaque), and put them in /usr/libexec/ching instead of the v7 /usr/games/ching.d. The data file and nroff macros are in /usr/share/games/ching
135 lines
3.7 KiB
C
135 lines
3.7 KiB
C
/* $NetBSD: castching.c,v 1.1 2005/06/30 13:30:33 perry Exp $ */
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/*
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* Copyright (c) 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Guy Harris.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1988, 1993\n\
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The Regents of the University of California. All rights reserved.\n");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)ching.cno.c 8.1 (Berkeley) 5/31/93";
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#else
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__RCSID("$NetBSD: castching.c,v 1.1 2005/06/30 13:30:33 perry Exp $");
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#endif
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#endif /* not lint */
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/*
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* castching - Read a question, cast a change, and output the line
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* values to the standard output for processing by "printching".
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <unistd.h>
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#include "ching.h"
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time_t now; /* current time */
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unsigned seed; /* seed for random number generator */
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int getquest(void);
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unsigned getrand(void);
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unsigned getrnum(void);
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char *change(void);
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char string[6+1]; /* where the actual change string is put */
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int table[2][2][2] = {
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{ { OYIN, YYANG,}, { YYANG, YYIN,} },
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{ { YYANG, YYIN,}, { YYIN, OYANG,} },
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};
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/*ARGSUSED*/
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int
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main(int argc, char **argv)
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{
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time(&now);
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/* randomize */
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seed = (int)now + getquest() + getgid() + getuid() + getpid();
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printf("%s\n", change());
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exit(0);
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}
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/*
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* Hash the question by adding all the characters together.
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*/
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int
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getquest(void)
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{
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int result;
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int c;
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result = 0;
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while ((c = getchar()) != EOF)
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result += c;
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return(result);
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}
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/*
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* Get a set of six lines making up a change.
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*/
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char *
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change(void)
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{
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int i;
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for (i = 0; i < 6; i++)
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string[i] = table[getrnum()&01][getrnum()&01][getrnum()&01] + '0';
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string[i] = '\0';
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return(string);
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}
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/*
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* Get a number more random than what getrand() gives.
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*/
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unsigned
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getrnum(void)
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{
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return((getrand())>>(getrand()%17));
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}
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/*
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* Get a random number.
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*/
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unsigned
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getrand(void)
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{
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return(seed = (seed*13077) + 6925);
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}
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